Q3:
Why do all four LED lights on the PV150 blink at the same time? Is the drive faulty?

A: The PV150 supports OTP (Over Temperature Protection) safe mode and powers off in the event of overheating. The four flashing lights indicate temporary shut-down to avoid damage due to overheating. When the PV150 returns to safe operating temperatures, it will resume normal operation, including LED display.